并联电路中总电阻和各支路的电阻有什么关系
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\u5173\u7cfb\uff1a 1/R=1/R1+1/R2
2\uff0c\u63a8\u5bfc
I=I1+I2
U=U1=U2
I=U/R
U/R=U/R1+U/R2
1/R=1/R1+1/R2
\u5e76\u8054\u7535\u8def\u603b\u7535\u963b\u4e0e\u5404\u652f\u8def\u7535\u963b\u7684\u5173\u7cfb\u4e3a\uff1a1/R\u603b=1/R1+1/R2+\u2026\u2026+1/Rn\uff0c\u5373\u603b\u7535\u963b\u7684\u5012\u6570\u7b49\u4e8e\u5404\u5206\u7535\u963b\u7684\u5012\u6570\u4e4b\u548c\u3002
\u5e76\u8054\u7535\u8def\u5176\u5b83\u8ba1\u7b97\u516c\u5f0f\uff1a
\u7535\u538b\u7684\u5173\u7cfb\uff1aU=U1=U2
\u7535\u6d41\u7684\u5173\u7cfb\uff1aI=I1+I2
\u7535\u963b\u7684\u5173\u7cfb\uff1a1/R=1/R1+1/R2
\u7535\u529f\u7684\u8ba1\u7b97\uff1aW=UIt
\u7535\u529f\u7387\u7684\u5b9a\u4e49\u5f0f\uff1aP=W/t
\u5e38\u7528\u516c\u5f0f\uff1aP=UI
\u7126\u8033\u5b9a\u5f8b\uff1aQ\u653e=I2Rt
\u5bf9\u4e8e\u7eaf\u7535\u963b\u7535\u8def\u800c\u8a00\uff1aQ\u653e=I2Rt =U2t/R=UIt=Pt=UQ=W
\u7167\u660e\u7535\u8def\u7684\u603b\u529f\u7387\u7684\u8ba1\u7b97\uff1aP=P1+P1+\u2026\u2026Pn
1/R=1/R1+1/R2+1/R3......+1/Rn=∑(Ri)(i=1、2、3、....n-1、n）
绛旓細鎬荤數闃诲皬浜庡悇鏀矾鐨勭數闃伙紝骞惰仈鐢佃矾涓細1/R鎬=1/R1+1/R2+1/R3+鈥︹1/RN銆傚苟鑱旀槸鍏冧欢涔嬮棿鐨勪竴绉嶈繛鎺ユ柟寮忥紝鍏剁壒鐐规槸灏2涓悓绫绘垨涓嶅悓绫荤殑鍏冧欢銆佸櫒浠剁瓑棣栭鐩告帴锛屽悓鏃跺熬灏句害鐩歌繛鐨勪竴绉嶈繛鎺ユ柟寮忋傞氬父鏄敤鏉ユ寚鐢佃矾涓數瀛愬厓浠剁殑杩炴帴鏂瑰紡锛屽嵆骞惰仈鐢佃矾銆
绛旓細鎬荤數闃诲皬浜鍚勬敮璺殑鐢甸樆 鎴戠敤鎴戝垵涓殑鐗╃悊鑰佸笀鐨勮娉曪細鍥犱负涓鏍圭數闃伙紝瓒婄矖鍏剁數闃诲氨鏈堝皬 鍥犳锛屾垜浠彲浠ュ皢骞惰仈鐢佃矾涓殑鎬荤數闃荤湅鎴愭槸鍚勬敮璺殑鐢甸樆鎹嗗湪涓璧凤紝鍙樼矖浜.骞惰仈鐢佃矾涓細1/r鎬=1/r1+1/r2+1/r3+鈥︹1/rn 鍐嶇粰浣犵偣鐢甸樆鐨勮祫鏂欏惂锛屼互涓婄殑鏄濮嗗畾寰嬩腑鐨勶細骞惰仈鐢佃矾涓荤數闃鐨勫掓暟绛変簬涓敮璺...
绛旓細鎬荤數闃鐨勫掓暟绛変簬鍚勬敮璺數闃鍊掓暟涔嬪拰銆1/R=1/R1+1/R2+1/R3...+1/Rn=鈭(Ri)(i=1銆2銆3銆...n-1銆乶锛
绛旓細骞惰仈鐢佃矾涓鐢甸樆鐨勫叧绯婚伒寰苟鑱旂數璺殑鍩烘湰瑙勫緥锛屽嵆鎬荤數闃鐨勫掓暟绛変簬鍚勫苟鑱旂數闃鐨勫掓暟涔嬪拰锛岀敤鍏紡琛ㄧず灏辨槸锛1/R鎬=1/R1+1/R2+鈥+1/Rn銆備篃灏辨槸璇达紝鎬荤數闃荤殑闃诲肩瓑浜鍚勬敮璺數闃闃诲肩殑鍊掓暟涔嬪拰鐨勫掓暟銆傚湪骞惰仈鐢佃矾涓紝濡傛灉涓や釜鎴栧涓鐢甸樆骞惰仈锛岄偅涔堝畠浠袱绔殑鐢靛帇鏄浉绛夌殑锛岃屾荤數娴佺瓑浜鍚勪釜鏀矾鐢垫祦涔...
绛旓細鍗鎬荤數闃鐨勫掓暟绛変簬鍚勫垎鐢甸樆鐨勫掓暟涔嬪拰銆傚浜巒涓浉绛鐨勭數闃诲苟鑱锛屽叕寮忓氨绠鍖栦负R骞=R/n銆骞惰仈鐢佃矾锛骞惰仈鐨勫悇鏀矾鐢靛帇鐩哥瓑锛屽共璺數娴佺瓑浜鍚勪釜鏀矾鍜屻傝嫢骞惰仈鐨勪袱鐢甸樆鍊间箣闂磋秴杩囧洓鍊嶏紝鍒欐荤數闃诲皬浜庝换涓骞惰仈鐢甸樆涔嬪笺傝嫢瑕佹眰R1涓嶳2鐨勫苟鑱旂數闃诲硷紝鍙厛浣滅洿瑙掑潗鏍囩郴xOy锛屽苟浣淵=X鐨勭洿绾縧锛屽湪OX杞翠笂鍙朅鐐...
绛旓細鎬荤數娴=U/Ra+U/Rb 鎬荤數闃=U/(U/Ra+U/Rb)=1/(1/Ra+1/Rb)鍗筹細1/鎬荤數闃=1/Ra+1/Rb 鍚岀悊锛屽皢鍘熸帹瀵兼墿灞曪紝鏈塶鏉鏀矾鏃讹細1澶勭數娴=U/R1 2澶勭數娴=U/R2 3澶勭數娴=U/R3 4澶勭數娴=U/R4 鈥︹澶勭數娴=U/Rn 鎬荤數娴=U/R1+U/R2+U/R3+U/R4+鈥︹+U/Rn 鎬荤數闃=U/(U/R1+U/R2+...
绛旓細骞惰仈鐢佃矾鐢甸樆鍏崇郴鏄骞惰仈鐨鍚勬敮璺數鍘嬬浉绛夛紝骞茶矾鐢垫祦绛変簬鍚勪釜鏀矾鍜屻骞惰仈鐢佃矾鎬荤數闃讳笌鍚勬敮璺數闃鐨勫叧绯讳负1/R鎬=1/R1+1/R2+1/Rn锛屽嵆鎬荤數闃荤殑鍊掓暟绛変簬鍚勫垎鐢甸樆鐨勫掓暟涔嬪拰銆傚苟鑱旀槸鍏冧欢涔嬮棿鐨勪竴绉嶈繛鎺ユ柟寮忥紝鍏剁壒鐐规槸灏2涓悓绫绘垨涓嶅悓绫荤殑鍏冧欢銆佸櫒浠剁瓑棣栭鐩告帴锛屽悓鏃跺熬灏句害鐩歌繛鐨勪竴绉嶈繛鎺ユ柟寮忋傜數闃诲惈涔...
绛旓細鈶ゅ湪骞惰仈鐢佃矾涓紝鍚勬敮璺殑鐢垫祦浜掍笉褰卞搷銆傜數鍘嬬殑鐗圭偣 鍦ㄥ苟鑱旂數璺腑鍚勬敮璺袱绔殑鐢靛帇閮界浉绛夈傜數闃荤殑鐗圭偣 鈶犲湪骞惰仈鐢佃矾涓荤數闃鐨勫掓暟绛変簬鍚勬敮璺殑鐢甸樆鍊掓暟涔嬪拰銆傗憽鎶妌娈靛浣撳苟鑱旇捣鏉ワ紝杩欑浉褰撲簬澧炲ぇ浜嗗浣撶殑妯埅闈㈢Н銆傛墍浠ワ紝骞惰仈鍚庣殑鎬荤粍姣斾换浣曚竴涓垎鐢甸樆閮藉皬銆傗憿n 涓浉鍚岀殑鐢甸樆R0锛屽苟鑱旓紝骞惰仈鍚庣殑鎬...
绛旓細褰鐢佃矾涓鏈変袱涓數闃绘椂锛孯1*R2/R1+R2 褰撶數璺腑鏈変袱涓互涓鐨勭數闃鏃讹細1/R=1/R1+1/R2+1/R3+1/R4...
绛旓細鎺ヤ笅鏉ワ紝鎴戜滑鏉ヨ冭檻骞惰仈鐢甸樆鐨勬荤數闃銆傛牴鎹骞惰仈鐢佃矾鐨鍘熺悊锛屾荤數闃绘槸鍚勬敮璺數闃鐨勫掓暟涔嬪拰銆備篃灏辨槸璇达紝濡傛灉鎴戜滑灏嗕袱涓數闃籖1鍜孯2骞惰仈锛岄偅涔堟荤數闃籖t = 1/R1 + 1/R2銆傝繖涓叕寮忓彲浠ョ悊瑙ｄ负锛氭荤數闃荤瓑浜庡悇鏀矾鐢甸樆鐨勫掓暟涔嬪拰銆傜幇鍦ㄦ垜浠彲浠ュ皢杩欎釜姒傚康搴旂敤鍒版洿澶嶆潅鐨鐢佃矾涓銆備緥濡傦紝濡傛灉鏈変笁涓數闃籖1銆丷2...
